Detection method of combustion oscillation characteristics under strong noise background

IF 1.2 4区工程技术 Q3 ENGINEERING, MECHANICAL

Mechanics & Industry Pub Date : 2020-01-01 DOI:10.1051/meca/2020085

Yunkun Wei, Tianhong Zhang, Zhonglin Lin, Qiling Xie, Yan Zhang

{"title":"Detection method of combustion oscillation characteristics under strong noise background","authors":"Yunkun Wei, Tianhong Zhang, Zhonglin Lin, Qiling Xie, Yan Zhang","doi":"10.1051/meca/2020085","DOIUrl":null,"url":null,"abstract":"After the lean fuel premixed combustion technology is applied to aero engines, severe combustion oscillations will be cased and led to hidden safety hazards such as engine vibration, further energy waste and other problems. Therefore, it is increasingly important to actively control combustion oscillations. In this paper, a multispectral radiation thermometry (MRT) is used to analyze the hydroxyl group, which is a measurable research object in the combustion chamber of an aero engine, and to fit the functional relationship between the radiation intensity ratio and the temperature in different bands. The theoretical value of the error is <2%. At the same time, in order to solve the problem of weak detection signal and excessive interference signal, an improved frequency domain filtering method based on fast Fourier transform is designed. Besides, the FPGA platform is used to ensure the real-time performance of the temperature measurement system, and simulations and experiments are performed. An oscillating signal with an oscillation frequency of 315 Hz is obtained on the established test platform, and the error is only 1.42%.","PeriodicalId":49018,"journal":{"name":"Mechanics & Industry","volume":null,"pages":null},"PeriodicalIF":1.2000,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mechanics & Industry","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1051/meca/2020085","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}

引用次数: 1

Abstract

After the lean fuel premixed combustion technology is applied to aero engines, severe combustion oscillations will be cased and led to hidden safety hazards such as engine vibration, further energy waste and other problems. Therefore, it is increasingly important to actively control combustion oscillations. In this paper, a multispectral radiation thermometry (MRT) is used to analyze the hydroxyl group, which is a measurable research object in the combustion chamber of an aero engine, and to fit the functional relationship between the radiation intensity ratio and the temperature in different bands. The theoretical value of the error is <2%. At the same time, in order to solve the problem of weak detection signal and excessive interference signal, an improved frequency domain filtering method based on fast Fourier transform is designed. Besides, the FPGA platform is used to ensure the real-time performance of the temperature measurement system, and simulations and experiments are performed. An oscillating signal with an oscillation frequency of 315 Hz is obtained on the established test platform, and the error is only 1.42%.

查看原文本刊更多论文

强噪声背景下燃烧振荡特性的检测方法

稀薄燃料预混燃烧技术应用于航空发动机后，会产生剧烈的燃烧振荡，导致发动机振动、进一步的能源浪费等安全隐患。因此，主动控制燃烧振荡变得越来越重要。本文采用多光谱辐射测温仪(MRT)对某型航空发动机燃烧室内的可测研究对象羟基进行了分析，拟合了不同波段辐射强度比与温度的函数关系。误差的理论值<2%。同时，为了解决检测信号微弱和干扰信号过多的问题，设计了一种基于快速傅立叶变换的改进频域滤波方法。此外，利用FPGA平台保证了温度测量系统的实时性，并进行了仿真和实验。在所建立的测试平台上获得了振荡频率为315 Hz的振荡信号，误差仅为1.42%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Mechanics & Industry ENGINEERING, MECHANICAL-MECHANICS

CiteScore

2.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： An International Journal on Mechanical Sciences and Engineering Applications With papers from industry, Research and Development departments and academic institutions, this journal acts as an interface between research and industry, coordinating and disseminating scientific and technical mechanical research in relation to industrial activities. Targeted readers are technicians, engineers, executives, researchers, and teachers who are working in industrial companies as managers or in Research and Development departments, technical centres, laboratories, universities, technical and engineering schools. The journal is an AFM (Association Française de Mécanique) publication.